Jerry Nicholson
I have a Sunjo that I bought primarily to clean my deck. I find it works well but I have to use a nozzle with a fairly narrow spray width. It came with several nozzles and the power plug has a built in GFCI. My grandson had it for a few months to clean car engines and chassis. He used the detergent injector and said it works well. I told him not to get his hand in the spray ---- so he got his hand in the spray. Said it hurt a lot but didn't seem to do any serious damage.

I wouldn't consider using it on a car finish. My wife wants me to clean windows with it but I told her no way. It would blast water into any little crack or opening and right into the wall.